If you are unfamiliar with Hilleberg tents, chances are you have never been at altitude, on a glacier and/or to a pole. These things pop up in the harshest environment in the world due to uncompromised craftsmanship and a family dedicated to making the best tents in the world. Founded in 1971, the Hilleberg family revolutionized all season tents with the creation of Kerlon fabric (6x stronger than any other tent fabric). With their Kerlon fabrics and 9mm or 10mm poles, Hilleberg tents are some of the lightest and strongest tents on the market.
The Nallo 3GT is constructed with their Kerlon 1200 fabric and 9mm poles coupled with all season construction. Too many stand alone features to differentiate, but some key attributes include: outer tent walls extend to the ground, linked/spate inner and outer tents for simultaneous pitching, massive vestibules, outstanding venting, pole sleeves and color coded poles, flat fell-seams (4 layers deep), attached/pre rigged guy lines (simply will not find better guy lines anywhere), adjustable pole tensioners, locking zippers, etc... These tents are absolute fortresses and weigh half of other 'like' tents. The Nallo 3GT (with absolutely everything that comes with it, ex: 20 v-peg stakes) weighs in at 6.13 pounds, easy to get that weight down to just under 6lb's. It boasts 36.6 ft of inner tent and 29 ft of vestibule space. Ditch the BD Megamid and use the vestibule as your hang out/cook tent as it is easy to dig out a bench and hole up in a storm. Tunnel tents can be challenging to pitch, at first, but offer outstanding space with plenty of sidewall and head room making this tent feel big. Ditch the inner tent, if conditions warrant, or replace the inner tent with an all mesh option for warmer climates/conditions. With all winter tents, a 3 person rating means comfortable for 2 but suitable for 3, but the tail end of this tent measures 50 inches, so big pads may get stacked up.
Set up, once practiced, is efficient and due to the linked inner/outer tents, keeps the inside out of the elements. Simply unfurl and stake out the two end points (either front or back) and pull out the remainder of the tent and stake down the opposite end. From there, it is following Hilleberg's simply pole configuration/color coded system and properly guying out the tunnel tent. If going on the snow, you will definitely not find a better snow anchor stake than their own snow and sand pegs (huge, light and pre-rigged) that are outstanding deadman.
Extra's include: full pole section to combat a break, high bathtub floor, attached internal guy line, plenty of pocket space, fabric backed mesh doors, dual entrances and configurations, enormous vents that can be closed with a snow-proof panel, looped guy lines and the ability to wrap around the pole to increase stability/strength, zipper flaps (keep elements off the zippers)...
Need more proof, Eric Larsen used their one pole Akto tent during a solo cycle to the South Pole. Check out the heritage and legacy associated with Hilleberg and start comparing features, weight, durability and you start to notice why they are pricey.
Go to www.hilleberg.com and sign up to get some test swatches of their Kerlon fabric and test it against common fabrics used across the industry. Their site leaves absolutely no questions and contains all the videos and reviews necessary from pitching, setting up a deadman, practical tips, choosing the right tent, equipment lists and all the FAQ's you can think of - no secrets, just an outstanding company and equally impressive product. Space is almost up, I cannot say enough about this company and their tents - absolutely the best!
Photos are of the Nallo 3GT set up facing Wheeler Peak.